When one not always a truck driver drives for a long period of time and his/her back sticks to whatever they are wearing and physically glues them to the seat.
Peter built drove for 14 hours straight and as he came to a stop he said "Dammit I'm stuck looks like I got trucker back again!"
A Fart, strong enough, and pungent enough, to leave a trail up ones back, when escaping.
Mildred, Im afraid you shall have to wash my sunday shirt, I dined with Edward last night, on Guinness, and steak. Im afraid I suffered a "Backtracker"